51479761 has 4 divisors (see below), whose sum is σ = 51494500. Its totient is φ = 51465024.

The previous prime is 51479737. The next prime is 51479767. The reversal of 51479761 is 16797415.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 46444225 + 5035536 = 6815^2 + 2244^2 .

It is a cyclic number.

It is not a de Polignac number, because 51479761 - 2⁷ = 51479633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51479767) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1165 + ... + 10213.

It is an arithmetic number, because the mean of its divisors is an integer number (12873625).

Almost surely, 2^51479761 is an apocalyptic number.

It is an amenable number.

51479761 is a deficient number, since it is larger than the sum of its proper divisors (14739).

51479761 is an equidigital number, since it uses as much as digits as its factorization.

51479761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14738.

The product of its digits is 52920, while the sum is 40.

The square root of 51479761 is about 7174.9397906881. The cubic root of 51479761 is about 372.0021991815.

The spelling of 51479761 in words is "fifty-one million, four hundred seventy-nine thousand, seven hundred sixty-one".